138468736 has 96 divisors (see below), whose sum is σ = 330663600. Its totient is φ = 56512512.

The previous prime is 138468709. The next prime is 138468779. The reversal of 138468736 is 637864831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1896796 + ... + 1896868.

Almost surely, 2^138468736 is an apocalyptic number.

138468736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138468736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165331800).

138468736 is an abundant number, since it is smaller than the sum of its proper divisors (192194864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138468736 is an frugal number, since it uses more digits than its factorization.

138468736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 111 counting only the distinct ones).

The product of its digits is 580608, while the sum is 46.

The square root of 138468736 is about 11767.2739408922. The cubic root of 138468736 is about 517.3493517790.

The spelling of 138468736 in words is "one hundred thirty-eight million, four hundred sixty-eight thousand, seven hundred thirty-six".